CF MOTO CF500-5B 2009, Service Manual, Page: 271 / 272

13 Troubleshooting
13 - 23
13
# #
12
$ $
Reaction slowly when in acceleration.
Possible defective part
"
1
#
fuel containing water
%
2
#
air intake pressure sensor and throttle
position sensor
%
3
#
spark plug
%
4
#
throttle valve body and idle speed side air duct
%
5
#
input air duct
%
6
#
idle speed valve
%
7
#
fuel injector
%
8
#
ignition timing
%
9
#
muffler
Overhaul
"
Ref no Operation Test result Next Steps
yes
Examine and repair air
input system
1 Check air cleaner if is clogged.
no next
yes next
2
Contact fuel pressure meter(contact front point of
oil input pipe of injector), starting engine, check the
fuel pressure whether is around 300kPa or not
no
examine and repair oil
support system
yes next
3
Check spark plug, look its type and gap if accords
with standard.
no Adjust or replace
yes Clean related parts
4
Disassembly idle speed valve and check the throttle
valve body, idle speed valve and idle speed side air
duct whether have carbide accumulated or not.
no next
yes next
5
Check air intake pressure sensor
#
throttle position
sensor and their wiring whether works regularly or
not.
no
examine and repair
wiring or replace sensor
yes Fault replacement
6
Disassembly injector, and check the injector by
special washing analysis instrument if exists the
phenomena of leaks, clogs or flux discrepantly.
no next
Yes Replace fuel
7
Check fuel and observe the fault if caused after
fueling
no next
yes next
8
Check engine ignition timing if accords with
standard.
no
examine and repair
ignition timing
yes next
9
Check the exhaust gas from muffler if exhausts
smoothly
no
Repair or replace
muffler
yes Diagnosis help
10
Contact with EFI commutator, open ignition switch,
check ECU5#
#
10#
#
23# stitch, the power whether
supply normal or not, check 2#
#
21# stitch whether
is puting up iron or not.
no
Examine and repair
relevant wiring
# #
13
$ $
No power and poor performance when in acceleration
.
Possible defective part
"
1
#
fuel containing water
%
2
#
air intake pressure sensor and throttle
position sensor
%
3
#
spark plug
%
4
#
ignition coil; 5
#
throttle valve body and idle speed side
air duct
%
6
#
input air duct
%
7
#
idle speed valve
%
8
#
fuel injector
%
9
#
ignition timing
%
10
#
muffler